package com.apex.utils;

import cn.hutool.core.lang.UUID;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;

import java.util.concurrent.TimeUnit;

/**
 * @ClassName SimpleRedisLock
 * @Description
 * @Author ZJX
 * @Date 2025/2/25 13:15
 * @Version 1.0
 **/
public class SimpleRedisLock implements ILock{
    private String name;
    private StringRedisTemplate stringRedisTemplate;
    public SimpleRedisLock(String name, StringRedisTemplate stringRedisTemplate) {
        this.name = name;
        this.stringRedisTemplate = stringRedisTemplate;
    }

    private static final String KEY_PREFIX = "lock:";
    private static final String ID_PREFIX = UUID.randomUUID().toString(true) + "-";
//    private static final DefaultRedisScript<Long> UNLOCK_SCRIPT;
//    static {
//        UNLOCK_SCRIPT = new DefaultRedisScript<>();
//        UNLOCK_SCRIPT.setLocation(new ClassPathResource("unlock.lua"));
//        UNLOCK_SCRIPT.setResultType(Long.class);
//    }

    @Override
    public boolean tryLock(long timeoutSec) {
//        线程id
        String threadId = ID_PREFIX + Thread.currentThread().getId();

//        获取锁
       Boolean success = stringRedisTemplate.opsForValue().setIfAbsent(KEY_PREFIX + name, threadId,timeoutSec, TimeUnit.SECONDS);

        return Boolean.TRUE.equals(success);
    }

    @Override
    public void unlock() {
        String threadId = ID_PREFIX + Thread.currentThread().getId();
        String id = stringRedisTemplate.opsForValue().get(KEY_PREFIX + name);
        if (threadId.equals(id)){
            stringRedisTemplate.delete(KEY_PREFIX + name);
        }
    }
}
